What is the average acceleration of a southbound train that slows down from 15 m/s to 8.6 m/s in 1.2 s?

Question

asked Apr 18, 2021 27.2k views

1 Answer

Kristof Feys · Answer 1 · 2021-04-23T18:53:57+0000

Answer:

The average acceleration of train is
$5.34\ m/s^2$

Explanation:

We have,

A train that slows down from 15 m/s to 8.6 m/s in 1.2 s. It means that 15 m/s is its initial velocity and 8.6 m/s is its final velocity.

It is required to find the average acceleration of the train.

$a=(v-u)/(t)\\\\a=((8.6-15)\ m/s)/(1.2\ s)\\\\a=-5.34\ m/s^2$

The average acceleration of train is
$5.34\ m/s^2$ . Negative signs shows that the train is decelerating.